inno-setup - 创新设置 : detect installation based on product code

Question

我想实现类似于 Inno setup - skip installation if other program is not installed 的东西

但我确实有 msiexec 产品代码(如 D3AA40C4-9BFB-4640-88CE-EDC93A3703CC)。那么如何根据这个产品代码检测是否安装了其他程序呢？

Answer 1

有 MsiQueryProductState为此功能。这是它的导入，带有用于您的任务的辅助函数:

[Code]
#IFDEF UNICODE
  #DEFINE AW "W"
#ELSE
  #DEFINE AW "A"
#ENDIF
type
  INSTALLSTATE = Longint;
const
  INSTALLSTATE_DEFAULT = 5;

function MsiQueryProductState(szProduct: string): INSTALLSTATE; 
  external 'MsiQueryProductState{#AW}@msi.dll stdcall';

function IsProductInstalled(const ProductID: string): Boolean;
begin
  Result := MsiQueryProductState(ProductID) = INSTALLSTATE_DEFAULT;
end;

及其可能的用法:

if IsProductInstalled('{D3AA40C4-9BFB-4640-88CE-EDC93A3703CC}') then
  MsgBox('The product is installed.', mbInformation, MB_OK);